//
//  UIViewController+additional.h
//  AnimationDemo
//
//  Created by jiaozenglian on 2020/7/13.
//  Copyright © 2020 Jiaozl. All rights reserved.
//

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@protocol BackButtonHandlerProtocol <NSObject>
@optional
// Override this method in UIViewController derived class to handle 'Back' button click
-(BOOL)navigationShouldPopOnBackButton;
@end

@interface UIViewController (additional) <BackButtonHandlerProtocol>

@end

NS_ASSUME_NONNULL_END
